Forum Discussion
carringb
Feb 02, 2017Explorer
4.10 gears is enough if you stay within the GCWR of 18,500. If you plan on towing heavy, and need the extra GCWR, 4.56 gears bumps you 22,000 pounds.
With the old 5-speed, 4.10s would net a little better highway fuel economy. With the 6-speed it does not, and that's why 4.56 gears became standard when the 6-speed came out (double overdrive is too tall with taller gearing, for a full profile motorhome with cabover).
With the old 5-speed, 4.10s would net a little better highway fuel economy. With the 6-speed it does not, and that's why 4.56 gears became standard when the 6-speed came out (double overdrive is too tall with taller gearing, for a full profile motorhome with cabover).
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